基于服务质量的WiMAX前向兼容LTE上行调度算法
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摘要
长期演进技术(LTE)可单向兼容全球微波互联接入技术(WiMAX),WiMAX到LTE的前向兼容却无法实现。为此,提出一种基于服务质量(QoS)的上行调度算法。通过为双方服务流提供多类映射规则,根据优先级对上行资源进行动态分配,满足类间不同链路的特定要求,确保同类内链路间的公平性。仿真结果表明,与经典的轮询算法相比,该算法在吞吐量和QoS方面有明显的优势,在超负荷情况下能够保持算法的健壮性,实现WiMAX到LTE的交互通信。
Long Term Evolution(LTE) performs one-way compatible to Worldwide Interoperability for Microwave Access(WiMAX),but the forwards compatibility from WiMAX to LTE cannot be realized.To solve the problem,an efficient uplink scheduling algorithm based on Quality of Service(QoS) is proposed.This algorithm provides elaborate mapping rules for both flows of service,and present dynamic schemes for uplink resource assignment based on priorities.It not only meets the requirements for different links,also ensure fairness among intra-class links.Simulation result shows that the algorithm has an obvious advantage in throughput and QoS comparing to a typical Round Robin(RR) algorithm,shows robustness in overload situation.The interoperability from WiMAX to LTE is successfully achieved.
Long Term Evolution(LTE) performs one-way compatible to Worldwide Interoperability for Microwave Access(WiMAX),but the forwards compatibility from WiMAX to LTE cannot be realized.To solve the problem,an efficient uplink scheduling algorithm based on Quality of Service(QoS) is proposed.This algorithm provides elaborate mapping rules for both flows of service,and present dynamic schemes for uplink resource assignment based on priorities.It not only meets the requirements for different links,also ensure fairness among intra-class links.Simulation result shows that the algorithm has an obvious advantage in throughput and QoS comparing to a typical Round Robin(RR) algorithm,shows robustness in overload situation.The interoperability from WiMAX to LTE is successfully achieved.
引文
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[7] 孟小琳.TD-LTE和WiMAX网络融合及网间切换控制研究[D].北京:北京邮电大学,2009.
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[9] 任参军,钱耘之,陈明.LTE系统上行链路无线资源分配算法[J].通信技术,2010,43(1):54-56.
[10] 曾宇辉,朱光喜,吴伟民,等.LTE系统中上行资源调度算法研究[J].小型微型计算机系统,2012,33(5):1018-1022.
[11] 郑培超,贾韶军,宋瀚涛,等.LTE系统上行保证服务质量的分组调度算法[J].电子科技大学学报,2009,38(2):186-189.
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[13] LESCUYER P,LUCIDARME T.Evolved Packet System (EPS):the LTE and SAE evolution of 3G UMTS[M].New Jersey,USA:Wiley Publishing,2008:38.
[14] 李剑,陈发堂.LTE中上行链路参考信号研究[J].电子测试,2009(5):35-38.
[15] TOSKALA A,HWANG W,WILLCOCK C.LTE for UMTS:evolution to LTE-advanced[M].New Jersey,USA:Wiley Publishing,2011:141-185.
[2] ANDREWS J G,GHOSH A,MUHAMED R.Fundamentals of WiMAX:understanding broadband wireless net-working[M].New Jersey,USA:Prentice Hall Press,2007:224-232.
[3] YANG Y,HU H,XU J,et al.Relay technologies for WiMAX and LTE-advanced mobile systems[J].IEEE Communications Magazine,2009,47(10):100-105.
[4] SESIA S,TOUFIK I,BAKER M.LTE-the UMTS long term evolution:from theory to practice[M].New Jersey,USA:Wiley Publishing,2009:317-320.
[5] FAZEL K,KAISER S.Multi-carrier and spread spectrum systems:from OFDM and MC-CDMA to LTE and WiMAX[M].New Jersey,USA:Wiley Publishing,2008:105-127.
[6] 马帅.基于WiMAX和LTE的近海水域无线网络规划研究[D].广州:华南理工大学,2014.
[7] 孟小琳.TD-LTE和WiMAX网络融合及网间切换控制研究[D].北京:北京邮电大学,2009.
[8] CAPOZZI F,PIRO G,GRIECO L A,et al.Downlink packet scheduling in LTE cellular networks:key design issues and a survey[J].IEEE Communications Surveys and Tutorials,2013,15(2):678-700.
[9] 任参军,钱耘之,陈明.LTE系统上行链路无线资源分配算法[J].通信技术,2010,43(1):54-56.
[10] 曾宇辉,朱光喜,吴伟民,等.LTE系统中上行资源调度算法研究[J].小型微型计算机系统,2012,33(5):1018-1022.
[11] 郑培超,贾韶军,宋瀚涛,等.LTE系统上行保证服务质量的分组调度算法[J].电子科技大学学报,2009,38(2):186-189.
[12] AHMED Z,HAMMA S.Two-level scheduling algorithm for different classes of traffic in WiMAX networks[C]//Proceedings of International Symposium on Performance Evaluation of Computer and Telecommunication Systems.Washington D.C.,USA:IEEE Press,2013:1-7.
[13] LESCUYER P,LUCIDARME T.Evolved Packet System (EPS):the LTE and SAE evolution of 3G UMTS[M].New Jersey,USA:Wiley Publishing,2008:38.
[14] 李剑,陈发堂.LTE中上行链路参考信号研究[J].电子测试,2009(5):35-38.
[15] TOSKALA A,HWANG W,WILLCOCK C.LTE for UMTS:evolution to LTE-advanced[M].New Jersey,USA:Wiley Publishing,2011:141-185.
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